To conjugate a regular -ir verb in the preterite tense, replace the infinitive ending with the correct ending for each pronoun. The box on the right shows the correct endings for regular -ir verbs.

Preterite forms of the verb escribir (to write):

escribir (example sentences) (full conjugation)

yo	escribí	(I wrote)
tú	escribiste	(you wrote)
Ud./él/ella	escribió	(you/he/she wrote)
nosotros (as)	escribimos	(we wrote)
vosotros (as)	escribisteis	(you guys wrote)
Uds./ellos/ ellas	escribieron	(you all/they wrote)

Some example sentences using the preterite tense are shown below:

Le escribiste a la empresa.
You wrote to the company.
Los hombres a quienes escribiste.
The men to whom you wrote.
Escribió un libro sobre la España de Carlos V.
He wrote a book about the Spain of Carlos V.
Yo le escribí una carta al abogado.
I wrote a letter to the lawyer.
Yo escribí la carta esta mañana.
I wrote the letter this morning.
Nosotros escribimos la lección.
We are writing the lesson.
Las muchachas escribieron la carta esta mañana.
The girls wrote the letter this morning.
No me escribieron.
They did not write me.